There currently entertainment using specimens of wildlife as animal circuses, researching the non governmental organization BIOFUTURA A.C.,  mentioned that animals from circuses are in deplorable living conditions, because are  part of the circus act and are seriously damaged in its entirety. Animal circuses are a paradigm of anthropomorphism because often the animals are  disguised and are forced to take positions of persons while they are under the domain of a human. Most of their lives are housed in trailers, not only during transport but permanently, resulting in most cases, the impairment of freedom of movement severely. Your diet is inadequate because the food is not supplied balanced and like what they consume in the wild, most have a dull coat and severe malnutrition. Some specimens of large mammals such as tigers, lions, jaguars, et cetera them amputate body parts like claws and fangs specifically teeth, molars and front, this can seriously affect its biophysiology, some animals have amputations and injuries termination of its  in dorsal to these animals lose balance spine and is easier to master and manage. The loss of control over external stimuli and deprivation of basic needs impose a frustration and stress that can lead to a neurosis and reflected through apathetic and abnormal behaviors. Animals in circuses live a life of suffering, domination, confinement, and violent training. Also although circuses argue otherwise, trainers use abusive methods to train animals and thus dominate by force to execute the numerous acts. This should show that the animals are always obliged to act: do so because they fear the punishment that will be given if you do not act. Some hooks and metal hooks are discreetly designed to give electric shocks, so that the public may not realize that they are electrocuted. 

Obviously, those who use violence in dealing with animals are more likely to also use it in their relations with humans. Considering numerous evidence linking animal abuse to violence toward humans, many governments have taken steps to strengthen their laws to protect animals, and in several countries the law enforcement and government agencies have adopted policies Based on these issues.